Suction-creating pump for cleaning and scrubbing machines.



0. A. KAISER.

SUCTION CREATING PUMP FOR CLEANING AND SGRUBBING MACHINES. APPLICATION IILBD NOV. 23. 1911.

1,049,729 Patented Jan.7, 1913.

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SUCTION CREATING PUMP FOR CLEANING AND SGRUBBING MACHINES.

APPLICATION I'ILED NQV.23.1911.

Patented Jan. 7, 1913.

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UNITED STATES PATENT OFFICE CHARLES A. KAISER, or rninanntiema, rnuivsyiyvanra; AssIeNoR TO BENJAMIN BEECHER, or PHILADELPHIA, PENNSYLVANIA.

sucTIoN-oREATINe PUMP rim CLEANING ann'scnumsme MACHINES.

Specification of Letters Patent Patented Jan. '7 1913.

Application filed iioe'mlier 28, 1912. Serial ms. 881,930.

To all whom, it may concern:

Be it known that I, CHARLES A. K ISER, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of certain new and useful Improvements in Suction-Creating Pumps for Cleaning and Scrubbing Machines, of which the following is a specification.

My invention relates to improvements in suction creating pumps for cleaning and scrubbing machines, the object of the invention being to provide an improved construction of suction creating means in which 1 two fans or pumps are empoyed working in unison, and driven by a motor between them and in the path of the air, whereby the motor is kept cool andthe fans or pum s at opposite ends of the motor shaft are nicely-balanced with relation to the motor, and utilize to the maximum degree the power of the motor in creating a partial vacuum or suction through the machine.

A further object is to provide an improved arrangement of combined centrifugal and axially driving fan or pump, in combination withacentrifugal pump, both communicating with a tight chamber in which a motor is provided to drive both of the pumps or fans, and one fan or pump assists the other in the suction of air through the chamber.

With these and other objects in view the invention consists in certain novel features of construction and combinations and; arrangements of parts, as will be more fully hereinafter described claims.

In the accompanying drawings: Figure 1, is a view in side elevation illustrating my improvements. Fig. 2, is a view in section on an enlarged scale on the line 22 of Fig. 3. Fig. 3, is a view in vertical longitudinal section, and Fig. 4, is a fragmentary view inse'ction on an enlarged scale on the line 44 of Fig. 3.

1, represents the cylindrical base of. my improved machine which constitutes a suction chamber having an inlet- 2 to which the ordinary dust directing pipe (not shown) is to be connected. This chamber 1 is pro Vided with an internal annular shoulder 3 against which a dust stopping screen 4, preferably of fabric, is located. This screen Pennsylvania, have invented and pointed out the I 4 is secured upon a ring 5, so that it may be readily removed and replaced as desired.

on the upper end of the base chamber 1, upper casing 6 is securely held by means base 1, andpositionedthrough bifurcated lugs 8 on casing 6, and secured by wing nuts 9. The upper casing 6 reduces in diameter from its lower edge where it engages the upper edge of base 1, to a diameter appreciably less than the diameter of the base 1, and is provided near its upper edge, with an internal ring 10 in which an electric motor 11 is secured. The shaft 12 of this electric motor is positioned vertically and centrally with chamber 10, and on its lower end my improved compound fan or pump 13 is secured, and on its upper end mv improved pump 14 is secured, preferably by set screws 15'. I

A truncated conical dome 16 is secured at its loweredge to thering 10 by means of screws 17, and the upper end of this dome 1'6 fits snugly against the fan or pump 14, and registers with the centralinlet to said fan, whereby the rotation of the fan causes a suction of air' through the dome.

pivot bolts 7 which are secured to the The fan 14 comprises upper and lower curved blades or vanes 20 extending from a point near the center of the plates to the outer edges of the plates, and said blades of least width at theirouter ends, and increasing'in w'idth to their inner ends. p

The lower fan or pump 13 has a compound action, namely, it exerts. centrifugal force and axial force because of the shape of its I blades 21, and the plates 22 and 23 betweenwhich saidlolades are secured. The lower plate 23 has, a central opening or inlet 24 which registers with an opening or inlet 25 in a ring 26, which is secured at its edges'to the casing 6. It will be noted that the plate 22 is horizontal throughout the greater portionplates .1 8j and 19 which are connected by of its diameter, and at its edges flares 'upwardly. The bottom'plate 23 and ring 26 flare upwardly and outwardly from their central openings at one angle for a predetermined distance, and then upwardly at a greater angle for the rest of their distance. The blades 21 conform. in shape to the space between the plates 22 and 23, and curve throughout their length. By this means, the blades curve rearwardly with relation to their direction of'turiiing, and are so shaped that they project upwardly, so that the 'fan or pump not only exerts a centrifugal force, but also a force axially of the fan or pump. The air is therefore taken in through "the opening 24, and is discharged into the chamber 27. This chamber 27 includes as its walls, the smaller diameter of easing 6, ring 26, ring 10, and dome 16, the opening in the ring 26 constituting the inlet to said chamher, and the upper end of said dome constituting an outlet to said chamber. This outlet is in close contact with the upper fan or pump 2O, so that while the lower fan or pump 13 forces the air into this chamber 27 the upper fan or pump 20 suckscthe air out of the chamber. The upper fan discharges the air. through an outlet .28 on a hood 29, removably securedto casing 6 by clamps 30, and set screws 31. This hood 29 is provided with a handle 32, which enables the machine to be readily carried about from placeto place as occasion may require.

33, represents the supply wireswhich are connected with an electric switch 34 on one side of easing 6, and'this switch is connected by wires 35 with the motor 11.

It will be noted that the electric motor 11 is located in the chamber 27 above referred to, directly in the path of'the air-which is forced through the machine. This not only maintains themotor cool, but it also enables the motor to drive the pumps 20 and 13 at the opposite ends ofits shaft. This equalizes the work of the shaft and the motor, balancing the motor at the center of the shaft where it will do the greatest good and utilize to the maximum degree, the power of the motor in the suction of theair.

Various slight changes might be made. in

the general form and arrangement of parts described, without departing from my invention, and hence I do not limit "myself. to the precise details ,set forth, but consider myself at libertyto make such changes and alterations as fairly fall withinthe spirit and-scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

r 1. In a machine of the character described,

the combinationwith a casing forming a .suction chamber having arelativelysmall inlet at one end, and a relativelysmalloutlet at its other end, of a shaft. projecting longitudinally of said chamber, a pump secured on said shaft within the chamber at the inlet of said chamber, of greater diameter than the inlet and operating-to suck air intothe chamber, and a second pump outside of the chamber, closely engaging the end of the chamber and'having its inlet registering with the outlet of the chamber, substantially as described.

, 2. In a machine of the character described, the combination with a casing forming a suction chamber having a relatively small inlet at one end, and a relativelysmall out-- let .at its other end,- of a shaft projecting longitudinally of said chamber, a pump secured on said shaft within the chamber at the inlet of said chamber, of greater diameter than the inlet and operating to suck air into the chamber, a second pump outside of the chamber, closely engagmg the end of the chamber and having its inlet registering with the. outlet of the chamber, said'lastmentioned pump of an appreciably greater diameter than the chamber outlet, and a motor on said shaft within the chamber, substantially as described.

3. In a machine of the character described, the combination with a casing. forming a suction chamber, of a ring in said chamber, a truncated conical dome secured to said ring, an electric motor secured to said ring, a. shaft on said motor, a pump on the lower end of said shaft, a pump on the upper end of, saidshaft closelyengaging the upper end of said truncated dome, and said dome, ring, and casing constituting, an airchamber through which air is-forced by said pumps, substantially as described.

4. In a machineof the character described,

the combination with a casing forming a suction chamber, of a ring in said chamber,

a truncated conical dome secured in said a shaft on said motor, a pump on the lower end of said shaft, a pump on the upper end of said shaft closely engaging the upper end of said truncated dome, said dome, ring, and

, casing, constituting an air chamber through which air is forced by said pumps, an electric switch on the outside of said casing controlling said motor, a hood inclosing the upper pump and having an outlet therein,

means removably' securing said hood to the casing, and 'a handle-on the upper end of said hood, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES AQKAIsER. Witnesses: I

, QHAs. Po'rrs, R. KREZNKEL.

ring, an electric motor secured to said ring,, 

